Cytotoxic 3,6-bis((imidazolidinone)imino)acridines: Synthesis, DNA binding and molecular modeling
作者:Ladislav Janovec、Mária Kožurková、Danica Sabolová、Ján Ungvarský、Helena Paulíková、Jana Plšíková、Zuzana Vantová、Ján Imrich
DOI:10.1016/j.bmc.2011.01.012
日期:2011.3
New acridine derivatives bearing two symmetrical imidazolidinone rings, 3,6-bis((1-alkyl-5-oxo-imidazolidin-2-yliden)imino)acridine hydrochlorides 6a–6e (alkyl = ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl), have been prepared and their interactions with calf thymus DNA and selected cell lines were studied. The DNA-binding of 6a–6e to ctDNA was examined by UV–vis, fluorescence, and CD spectroscopy
带有两个对称咪唑啉酮环的新a啶衍生物,即3,6-双((1-烷基-5-氧代-咪唑啉丁-2-吡啶)亚氨基)ac啶盐酸盐6a - 6e(烷基=乙基,正丙基,正丁基,已经制备了正戊基,正己基,并研究了它们与小牛胸腺DNA以及所选细胞系的相互作用。通过紫外可见,荧光和CD光谱检查了6a – 6e与ctDNA的DNA结合。通过紫外可见光谱法测定的结合常数为1.9×10 5 –7.1×10 5 M -1。电泳分离证明配体6a – 6e浓度为40μM时可抑制拓扑异构酶I,尽管只有那些具有较长烷基链的酶才能穿透膜并有效抑制细胞增殖。发现3,6-双((1- n-己基-5-氧代-咪唑啉丁-2-基亚胺基)亚氨基)ac啶盐酸盐(6e)的细胞毒性试验中活性最高,IC 50 = 2.12μM (HL 60)和温育72小时后为5.28μM(L1210)。使用分子动力学模拟和溶剂可及表面积(SASA)的计算来探索插层机